An efficient FE computation for predicting welding induced buckling in production of ship panel structure
TL;DR: In this paper, an efficient FE computation which is an elastic FE analysis based on inherent deformation method, is proposed to predict welding induced buckling with employing large deformation theory, and an application in ship panel production is carried out.
About: This article is published in Marine Structures.The article was published on 2015-04-01. It has received 62 citations till now. The article focuses on the topics: Welding & Fillet weld.
Citations
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TL;DR: In this paper, a sequentially coupled thermo-mechanical finite element model that considers temperature-dependent material properties, high temperature effects and a moving volumetric heat source was used to investigate the effect of welding sequence on the residual stresses and distortions in T-joint welds.
95 citations
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TL;DR: In this paper, the influence of welding process, constraints, solid phase transformation and multi-pass welding on deformation and residual stress was discussed, and computation accuracy and efficiency were summarised.
Abstract: Welding deformation and residual stress have negative influence on assembly accuracy and service performance. Thermal elastic plastic (TEP) and inherent strain finite element analysis (FEA) methods were used to study this challenge. Basic principle of these two methods was first introduced. The influence of welding process, constraints, solid phase transformation and multi-pass welding on deformation and residual stress was discussed, and computation accuracy and efficiency were summarised. Loading method of inherent strain in inherent strain FEA was analysed, interface element was introduced to simulate effects of the gap on deformation in assembly welding especially for large structures. The future work, including accurately multiscale TEP model, efficiently transient prediction method of large structures, and flexible evaluation software, was planned.
45 citations
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28 Apr 2017
TL;DR: In this paper, a series of static and dynamic characterization tests on the as built catamaran model was conducted to provide a reliable and well identified physical model before the towingtank tests were carried out for giving key insights into the wetdeck load and responses as well as an FSI validation dataset for numerical solvers.
Abstract: The investigation of wetdeck slamming phenomenon is a challenging Fluid-Structure Interaction (FSI) problem for both experimental and numerical analysis, requiring detailed design and structural assessment of the physical model. The focus of this paper is to document the design approach and the testing effort devoted to provide a reliable and well identified physical model before the towingtank tests were carried out for giving key insights into the wetdeck load and responses as well as an FSI validation dataset for numerical solvers. Thus, one of the main objectives is reducing the uncertainty linked to the modeling of the multi-hull structure by performing a series of both static and dynamic characterization tests on the as built catamaran model. The insight gained from this test campaign will be used to update the structural models coupled within the FSI solvers to increase the accuracy of the predicted hydrodynamic loading. Among FSI problems still receiving positive attention in ship and offshore engineering, the accurate prediction of complex loading and responses on multi-hull vessels is particularly demanding, since it involves two-way coupling of the deck structure with the flow impinging on it. Currently, there is a gap in available experimental FSI data related to this problem that can be used for numerical solver validation. Current FSI data sets are severely limited by the uncertainties associated with the experimental setups. Furthermore, though segmented model tests have become more feasible and popular for monohulls, not many experimental campaigns (Hermundstad et al. 1995, Kyyro & Hakala 1997, Cheng, F. 1997) exist for segmented catamarans that provide both global and local loads and hull responses. The only systematic investigation on elastically scaled catamarans was carried out by Lavroff et al. (2007, 2013). Dessi et al. (2016) have already illustrated the preliminary experimental results on an elastically scaled model of a SWATH aimed to accurately depict the wave loading and structural response from seakeeping tests. In the present paper the focus is instead on the structural tests performed for the physical model qualification with an extended account of the dry and wet vibration mode identification of the entire catamaran.
43 citations
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TL;DR: In this article, a mechanism investigation of welding induced buckling by elastic FE analysis using inherent deformation, an application for predicting and mitigating the welding-induced buckling in fabrication of ship panel with thin plates by employing different welding procedure patterns was carried out.
43 citations
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TL;DR: In this paper, the possible welding distortion during the fabrication of I section welded structure in cantilever beam of a jack-up drilling rig was studied with prediction and mitigation, and some mitigation practices such as application of inverse distortion, optimization of welding sequence and constraint methods, were conducted and examined.
39 citations
References
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01 Jan 2005
TL;DR: In this article, a computer simulation of Welding Processes is presented, where the evolution of microstructure depending on temperature and deformation of the Welded Structures and applications of welding in Industrial Fields.
Abstract: Computer Simulation of Welding Processes.- Thermal Analysis of Welds.- Evolution of Microstructure Depending on Temperature.- Evolution of Microstructure Depending on Deformations.- Carburized and Hydrogen Diffusion Analysis.- Welded Structures and Applications of Welding in Industrial Fields.- Fracture Mechanics.- Input Data for Computational Welding Mechanics.
435 citations
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TL;DR: In this paper, a three-dimensional, thermo-elastic-plastic, large deformation finite element method (FEM) is used to simulate welding distortion in a low carbon steel butt-welded joint with 1mm thickness.
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